Section 135(1) in The Navy (Pay And Allowances) Regulations, 1966
(1)Suitable master Chief Petty Officers I and II other than those holding honorary commissions, shall receive acting allowance at the following rates when appointed in officers' vacancies in ships and establishments other than Command Headquarters and Naval Headquarters, wherever they arise as a result of shortage of officers in both General and Special Duty Lists, but not due to vacancies caused by leave, temporary duty or courses of instructions, namely:Rs. p.m.(a)Master Chief Petty Officer I when officiating in a vacancy of Lieutenant Commander; 100(b)Master Chief Petty Officers I and II when officiating in a vacancy of Lieutenant or Sub-Lieutenant, 75.